Fuzzy logic for preconstruction project planning index

Planning comes in the first place and can be considered as one of the most important factors in managing construction projects. This research aims to introduce a Quality Index for Preconstruction Project Planning (QIPPP). The development of the QIPPP model follows four steps. First, collecting factors affecting the preconstruction project planning (PCPP) through a comprehensive literature review. Second, identifying the most important factor using Delphi technique. Third, assigning relative weights to each factor using the Analytical Hierarchy Process (AHP). Fourth, developing and validating a precise model for QIPPP. This model helps the user to predict the percentage of matching between the preconstruction plan and the actual values after finishing the whole project. Both deterministic model and fuzzy model have been developed where the fuzzy model produces better results than the deterministic model. This research uses project duration as a bench mark to evaluate the model by comparing the model result with two case studies.